Nozzle for sprayers



arch 17, 1936. H, E, BRANDT NOZZLE FOR SPRAYERS Filed Aug. 2, 19 34 UNITED STATS PA NOZZLE FOR SPRAYERS Henry E. Brandt, North St. Paul, Minn., assignor to The Dobbins Manufacturing Company, North St. Paul, Minn, a corporation of Minnesota Application August 2, 1934, Serial No. 738,085

3 Claims.

in a flaring body or stream. secured by a nut I3 to a plunger rod M extending It is an object of this invention, therefore, to through the end Ila of said. cylinder and having provideasimple and efficient structure of sprayer a handle !5 secured thereto at its outer end. nozzle comprising few parts and having means Said rod M also preferably has secured thereon for finely dividing and mixing the air and liquid in any suitable manner, as by welding, a stop and efficiently discharging the same. collar I6. End member I la is shown as threaded 5 It is a further object of the invention to proonto cylinder H. Cylinder it has a partition vide a nozzle structure comprising a nozzle mem- 1 lb extending thereacloss adjacent One the her having a chamber therein with a discharge sa e having an ape therethrough passage leading therefrom together with means y Cloned by a check flexible Valve for delivering air tangentially into said chamber While difielenfl types of Valves might e d, i 2Q from about the sides thereof and means for (1 the embodiment of the invention illustrated valve livering liquid centrally to said chamber whereby I7 is shown as a sheet of flexible material such as th i d liquid are given whirling motion in leather, secured to partition lib at one side of said chamber and the liquid is sprayed in finely p ng y a ed rivet "3- Cy nd ll divided c diti beyond partition I lb, and container IE3 at the top 25,

It is still another object of the invention to prothereof have registermg opemngs Cylinder vide anozzle structure comprising a nozzle mem- H has a frustocomca'l portlon at 1175 f her having a longitudinal passage therethrough, pp s t member lid and a nozzle member I9 18 a tube for supplying liquid under pressure exsecured in an opening in the end of said portion tending through said passage and formin an lld. Member 19 can be secured in any suitable annular chamber therein, a cap removably semanner as y Welding 0 Soldering- Member cured to said member having a chamber therein has a longitudinal passage |9a extending with a discharge passage leading therefrom, said trally therethrollgh a d the Sa a a p ura y cap holding said tube in place nd having pasof radial slots I9b extending outwardly to its sages leading to said chamber from said annular p ry f m pa sa e Mia at the outer nd 35 passage for causing a whirling movement of air thEYBOf- A tube 20 is p v the a having and liquid in said chamber, said tube being readily a flange 20a at one end engag the Outer end of removable. when said cap i rem d, member l9 and the same extends through passage These and other objects and advantages of the t cylinder 1 I and en W dIY l0 invention will be fully set forth in the following thr h openings ll int ntai r the l w 40 description made in connection with the accom- Op n d O a d ube being disposed a j panying drawing, in which like reference charthe bottom of container II]. A pair of holes 20b acters refer to similar parts throughout the sevare formed in tube 20 adjacent flange 20a, afforderal views and in which: ing communication between the interior of said Fig. 1 is a view partly in side elevation of a tube and the annular passage about tube 2i]. A 45 sprayer of the type used, some parts being shown cap 2| is interiorly bored and threaded to be in Vertical Section; screwed onto the threaded periphery of member Fig. 2 is a partial vertical longitudinal section l9 and the end wall of the bore in cap 2! engages 0f the device; the outer side of flange 23a holding the same Fig. 3 is a vertical section taken on line 33 of firmly against the end of member I9. Cap 2| has 59 Fig. 2 as indicated by the arrows; a chamber 2la therein shown as centrally dis- Fig. 4 is a vertical section taken on line 4-4 of posed and communicating with the passage Fig. 2 as indicated by the arrows; and through tube 23. Said cap also has a small dis- Fig. 5 is a partial view in side elevation with charge aperture or passage 2th disposed centralsome parts removed. 1y thereof and leading from chamber 2| a. Said 55 This invention relates to a sprayer such as is used to spray insecticides and other liquids, and particularly to a novel structure of nozzle for such a sprayer.

In the sprayer of the type used the liquid is sprayed by means of compressed air and it is desirable to have the liquid and air thoroughly mixed to finely divide the liquid and so that the same can be sprayed from a discharge passage Referring to the drawing, a sprayer is shown comprising a liquid container I0. While this container may take various shapes, in the embodiment of the invention illustrated it is shown as of cylindrical shape. Said container It] has secured thereto and set somewhat thereintoa cylindrical member I I, the same forming a pump cylinder and having reciprocable therein a cup plunger 52 of leather or similar flexible material cap also has a plurality of passages 2 I extending outwardly from passage Zla, the same being arranged tangentially as shown in Fig. 4. The passages 2| 0 communicate at their outer ends with the passages [9b with which they are in longitudinal alinement. When the cap 2| is removed the tube 20 can be Withdrawn through member 19 and removed as indicated in Fig. 5.

In operation, the liquid to be sprayed is placed in container ID. The handle I is reciprocated and air is pumped in cylinder II and forced through the opening He in partition llb. Valve I! prevents the passage of air back through opening lie so that compressed air is contained in cylinder II beyond partition Nb and on top of the liquid in container l0. Liquid is forced upward through tube 20 and passes from the end of said tube into chamber Zia. Compressed air at the same time is forced through passage l9a around said tube and this air passes through slots [9b around the edge of flange 20a into the passages 2! c and enters chamber Zla. The tangential jets of air passing into chamber Zla cause a whirling motion in said chamber and the air and liquid passes out through discharge passage 2|b in the shape of a cone, the liquid being finely divided. The liquid and air are thoroughly mixed in chamber 2 la and the liquid divided into fine particles. Some air also enters tube 20 through openings 20b and this also assists in the disintegration and discharge of said liquid. The action of the nozzle has been found to be a great improvement upon prior structures used. As already stated tube 20 can be readily removed when cap 21 is removed,

From the above description it is seen that ap plicant has provided a very simple and efficient form of sprayer nozzle. The parts of the nozzle are quite few in number and the same are easily made and assembled. The device has been amply demonstrated in actual practice and found to be very successful and eflicient.

It will, of course, be understood that various changes may be made in the form, details, arrangement and proportions of the parts, without departing from the scope of applicants invention, which generally stated, consists in a device capable of carrying out the objects above set forth in the parts and combinations of parts disclosed and defined in the appended claims.

What is claimed is:--

1. A sprayer structure having in combination,

a nozzle member having a longitudinal passage therethrough, a liquid supplying tube extending through said passage and forming an annular passage about said tube, a second member secured to said nozzle member having a substantially cylindrical chamber therein at the end of said tube, said tube having an opening at its end for discharging into said chamber said member having a discharge aperture of much smaller diameter than said opening leading from said chamber, a plurality of passages in said structure leading to said chamber and tangentially arranged relatively thereto, means connecting said last mentioned passages and said annular passage, means for supplying liquid under pressure to said tube and air under pressure to said annular passage whereby said air and liquid are delivered to said chamber and given a whirling motion therein.

2. A sprayer structure having in combination, a nozzle member having a longitudinal passage therethrough, a tube for receiving liquid under pressure extending through said passage and forming an annular chamber about said tube, said tube having a flange engaging the end of said nozzle member, a cap threaded on said nozzle member and engaging said flange having a small discharge aperture and having a substantially cylindrical chamber therein outwardly of said flange communicating with said tube, said tube having an open end discharging centrally into said chamber, a plurality of passages leading outwardly from said chamber and tangentially arranged relatively thereto, means connecting said last mentioned passages and said annular passage, and an opening in said tube communicating with said annular passage.

3. A sprayer nozzle having in combination, a member having a substantially cylindrical chamber therein with a discharge passage of very much smaller diameter than said chamber leading from said chamber, a tube having an open end for delivering liquid under pressure centrally to said chamber, means for delivering air under pressure tangentially to said chamber beyond said tube whereby said liquid and air are mixed and give a whirling motion in said chamber and projected through said passage and means for delivering air to said tube a short distance from said chamber to preliminarily break up said liquid.

HENRY E. BRANDT. 

